Gustus h



(No Model.)

N- JOHNSON 8a A. H. JONES.

' CENTRAL DRAFT LAMP.

No. 564,017. Patented July 14, 1896.

UNITED STATES PATENT ()FFICE.

NIS JOHNSON AND AUGUSTUS H. JONES, OF MERIDEN, CONNECTICUT, AS-

SIGNORS TO THE MERIDEN BRONZE COMPANY, OF SAME PLACE.

CENTRAL-DRAFT LAM P.

SPECIFICATION forming part of Letters Patent NO. 564,017, dated July 14,1896. Application filed August 7, 1893 Serial No. 482,597. (No model.)

To all whom it may concern.-

Be it known that we, NIS JOHNSON and AU- GUSTUS H. JONES, of Meriden, inthe county of New Haven and State of Connecticut, have invented a newImprovement in Central-Draft Lamps; and we do hereby declare thefollowing, when taken in connection with accompanying drawings and theletters of reference marked thereon, to be afull, clear, and

exact description of the same, and which said drawings constitute partof this specification, and represent, in-

Figure l, a vertical sectional View of a central-draft lamp embodyingour improvements,

I 5 the draft-tube being broken away to more clearly disclose theconstruction of the wickcarrier; Fig. 2, a detail view of the upper endof the tubular guide and operating-rod, viewed in the directionindicated by the arzo row, Fig. 1; Fig. 3, an enlarged detail showingaportion of the draft-tube and the combined secondary perforatedair-distributer and drip-trough; Fig. 4, a detail View showing thecombined secondary air-distributer and drip-trough in plan within thedraft tube, the latter being broken away to disclose thedischarge-openings.

Our invention relates to a central-draft lamp, and especially toimprovements in the means for adjusting the wick, in the wickraiser, andin the means for distributing the air and permitting the return of oilto the wick, its objects being to produce a simple, convenient, andeffective device, possessing advantages over lamps of a similar type.

\Vith these ends in view our invention consists in certain details ofconstruction and combinations of parts, as will be hereinafterdescribed, and then particularized in the 4o claims.

I11 the drawings we have shown an ordinary mammoth lamp-fount A, mountedon its customary perforated base A, and provided with the central-drafttube B. Y At one side of the lamp-fount A is located a tubular guide C,which extends completely through the same, at both its lower end 0 andits upper end 0, said ends projecting from the lampfount. The upper end0 of the guide C is constructed so as to take into the screwthreads cl,of coarse pitch, formed on the vertical operating-rod D near its upperend. This operating-rod -D extends beyond both ends of the guide C, andat its lower end is provided with a milled knob E, whereby it may berotated within the said guide. The upper end of the rod Dis providedwith a button F, which is received by screw-threads f, formed 011 thesame above the coarse threads (1. The particular construction wherebythe upper end 0 of the tubular guide C is adapted to take into thecoarse screw threads (Z may, of course, vary-as, for instance, insteadof the short spiral ribs C upset on its inner surface, it may haveinwardly-proj ecting points or studs.

The upper end of the operating-rod D swivels or turns in a head or diskG, located at the upper end of the draw-bar H, which passes into thelamp-fount and is provided with means for raising the wick. The lem ralstem h, at the lower end of the draw-bar H, passes through a verticalslot 1, formed in the fixed tubular section J, which depends from thetop of the lamp-fount and is concentric with the draft-tube l3, andcoincident with the neck of the fount, to which it corresponds indiameter, wherebya large annular chamber J is formed between it and thedraft-tube. A tubular section K, attached to the stem h of the draw-bar,telescopes within the tubular section J. These tubular sections J K aretherefore much larger than the ordinary wick-band, and they dispensewith the same. Struck out of the inner tubular section K, so as to leavevertical openings 7e, are vertical wick-holding jaws L, formed at theirupper ends with outwardly-bulged bearing portions M, and toothedinwardlyprojecting lips m, which bite into or engage the wick. The jawsL, while they are shown as integral with the inner telescopic section K,it is evident that they may be formed separate therefrom and attachedthereto, but in either case they are to be made of spring metal.

The natural tendency of the jaws is to spring outward, but the contactof the bulged bearing portions M with the inner wall of the outer fixedtelescopic section J forces the toothed lips m into the wick. WVhen,however, the draw-bar H is raised by the operating-rod E to the positionto release the jaws from the wick, the said jaws will be permitted tospring outward from the wick by reason of the clearance spaces oropeningsN in the upper end of the section J, which receive the bulgedbearing portionsM when the latter are in range with them. In the actol." raising the wick the lower projecting end c of the guide U forms astop for the impingement of knob I!) when the jaws have been releasedfrom the wick. \Vhen the operating-rml D is lowered, the jaws are causedto again move inwardly, so as to engage the wick, by the inclines informed on the under side of: the bulged bearing portions M being forced.in contact with the bottom edges of the clearance spaces N.

It is designed that the pitch of the screw (7 should. be such as tocause the rod 1) to rotate under pressure exerted on the button 11, thuspermitting the rod to be plunged or shoved down (prickly, so as to havethe advantage of a plunge and screw. Such construction is not claimedherein as broadly new, but only where the operating-rod turns within andis raised and lowered in a :iixed guide. 13y constructing the wickadjuster or raiser with these two collars .l K, the lamp can be easilywicked, and an. ordinary instead of a special wick may be employed.

At the. upper end of the draft-tube 13 is the customary perforatedair-distriljniter O, having the deflector I at the top. A short distancebelow the top of the drat'ttul,)e is an internal annulus or ring Q,which flares downwardly, and at its lower end is provided with ahorizontal peripheral .l'l ange q, whereby it is 'iirmly secured to theinner wall of the said tube. The lower edge of the air-distributcr restson this flange 1. The upper end. of the annulus or ring hasanupwardly-projecting vertical annular flange r. Between the flanges q andr the said annulus or ring is furnished. with perforations R, throughwhich the air passes, and whereby it is equally distribntcd in itspassage to the air-distributor 0. It will be noted that this annulus orring constitutes what we may term a secondary air-distributer, and atthe same time serves as a drip-trough to catch the oil (ii-upping fromthe wick. The flange (1 is, of course, imper- Eorate, and the oildrippin thereupon will be permitted to escape back into the lamp-fountthrough the medium of the discharge-openin .9, made in the draft-tubel3.

Although we have shown our improvements applicable to what is called amammoth lamp, yet we do not limit ourselves thereto, as they may beapplied to smaller lamps having their wicks adjusted from the top of thefounts. lVc do not limit ourselves to the p recise form of devicesherein shown, as other and different constructions may be adopted andmaybe resorted to by skilled mechanics without departing from the scopeand spirit of our invention. \Ve are aware, however, that it is old toconstruct a wick-adju sting device which provides for plunging andlifting the wick by the direct action of a draw-bar, and also foreffecting a close or line adjust ment of the wick by turning alinger-button. \Vc are also aware that it is old to engage a wicklocated upon a central dra'l't-tube by means of spring wick-grippingjaws carried by a wick-holder and normally held in. their gri ipingpositions, but allowed to retire and release the wick when thewick-holder is raised in the lamp-fount to a predetermined elevation.\\'e are also aware that a wickadjusting device containing anoperating-rod projecting above and below the lamp-[:ount and adapted tobe operated either by its upper or lower end, and located within abearing-tube also mounted in the lonnt, is old. \Ve do not, thercli'ore,claim either of those constructions ln'oadly.

llav l1] lully dcscri bed our invention, what we claim as new, anddesire to secure bylletters Patent, :is-

l. I n accntral-draft lamp, the cmnbiiuttion. with the t'ount andcentral draft-tube thereof, of a'vertieally-arranged nonarotatableguidetube permanently mounted in the fount and fixed at its upper andlower ends thereto, an externally screw-threaded lon gitudinallymovaldc, revoluble operating-rod located within and projecting aboveand below the ends of the said guide-tube, which takes into the threadsof the rod, an operating-knob or button located at the projecting lowerend oi. the operating-rod, for operating the same, a wick-holdercombined with the central dral'ttube, and movable up and down thereupon,adraw-bar constructed and arranged independent of the guide-tube,connected at its lower end with the wick -ho1der, passin through theupper portion of the lamp-fount at a point between the neck thereof andthe guide-tube, and having its upper end turned outward and furnishedwith a head having a central vertical perl'orat ion through which theupper end of the operatinga'od projects, and in which the said rod isfree to turn; and a button applied to the projecting upper end of therod, and bearing on the upper face oi. the said head, rotating with therod and coupling the same with the draw-bar, the threads of the rodbeing so coarse as to permit it to be plunged up and down through themedium of the draw-bar, in the head of which it then. rotates idly inone direction or the other, substantially as described.

2. Ina central-draft lamp, the combination. with the fount and central.dratt-tulim thereof, of a fixed tubular section cxtendin down into the:lount from the neck thereof to which. it COl'lfOSPOlltlS in diameter,and constructed near its upper end with clearance spaces, averticallymovable tubular section tittin within the said fixed sectionwhich forms a guide for it, and provided with one or morevertically-arranged wick-jaws constructed to normally ride upon the inneface of the fixed section by which their inwardly-turned ends areprojected inward to engage a wick upon the draft-tube, with which bothsections are concentric, and from which they are separated by an annularchamber, and exerting a constant effort to spring outward away from thedraft-tube; and means mounted in the lamp-fount, passing through thefixed sec tion, and connected with the movable section for raising andlowering the said movable section, whiclnwhen sufliciently raised bringsthe upper ends of the wick-jaws into range with the clearance spaces inthe fixed section, permitting them to spring outward and disengage thewick, substantially as described.

3. In a central-draft lamp, the combination with the fount and centraldraft-tube thereof, of an air-distributor adapted to be inserted intothe upper end of the said draft-tube, and a perforated annulus locatednear the upper \Vitnesses:

GEORGE A. CLARK, WILLIAM F. KERR.

